PHY 580 - ASTROBIOLOGY FOR TEACHERS


ADDITIONAL QUESTIONS FROM THE READING


Chapter #8 Is life on Mars Possible?

 

1. Does the temperature of the Martian surface ever rise above the freezing point of water? If so where on the Mars does this occur. (page 119)

2. What is the average surface temperature of Mars. (page 119)

3. What is the atmospheric pressure of mars at the surface? How does this value compare to Earth? (page 119)

4. What is most abundant molecule that found in the Martian atmosphere? (page 119)

5. What is the period of a Martian day? (page 119)

6. What is the period of a Martian year? (page 119)

7. Why are the seasons in the southern hemisphere of Mars more sever than those of the northern hemisphere? (page 120)

8. Jakosky states that as much as 1/3 of the CO2 in the Martian atmosphere will cycle from being condense into the polar caps and then sublime back into the atmosphere. Does this mean that there are periods of time where liquid CO2 are present on the surface of Mars as the frozen CO2 melts? Explain why or why not. (page 120)

9. There is a strong likeliness that frozen water exists on or in the Martian surface and the temperature of the Martian surface is known to exceed the melting point of water, however liquid water is near impossible to find on the surface of Mars. Explain this apparent contradiction. (page 122)

10. What affect would the small abundance of ozone and the thin Martian atmosphere have on the potential for life? (page 122-123)

11. Describe the many features on Mars that suggest that prior to 3.5 b.y.a the temperature of Mars was much warmer than today. (page 123 &endash; 125)

12. Describe the Martian surface features that suggest that Mars had liquid water flowing on the surface in the past (page 123 &endash; 127)

13. Where is the water that flowed through the Martian channels thought to have come from? (page 127)

14. Describe the evidence used to support the idea that the SNC meteorites originate from Mars. (page 130)

15. Describe the two possible origins for life on Mars proposed by Jakosky. (page 132-134)

16. Describe the Viking Carbon Assimilation experiment and the results/conclusions obtained from these experiments. (page 135- 136)

17. Describe the Viking Labeled Release experiment and the results/conclusions obtained from these experiments. (page 136- 137)

18. Describe the Viking Gas Exchange experiment and the results/conclusions obtained from these experiments. (page 137)

19. Describe the Viking Gas chromatograph/mass spectrometer experiment and the results/conclusions obtained from these experiments. (page 137- 138)

20. Where are the places that Jakosky suggest we search for evidence of extinct life on Mars? (page 139 - 140)

21. What is the estimated percentage of total volcanism that may have occurred on Mars as compared to Earth? (page 140)

22. What is the estimated thickness of surface material that has been removed through weathering on mars? (page 140)


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